So I Bought an STP Freely...

This is part question, part discussion. After buying and trying/failing with about 10 STPs and asking for recommendations I settled on the STP Freely with a cake bandit harness. I used it in the shower a few times with most occasions being successful. However, there are some newly developing issues. The pee doesn't really go out far. It just sorta ends up in between my feet. I can't really aim with it. The second issue is that although the cake bandit harness keeps everything pointed down, I can't pull the STP back enough to use it to pee if I'm wearing the harness. When I do pull it back the front lip falls out of the harness and it can't be positioned well.

Anybody else in a similar boat? Any ideas on where to go from here?